Locking device



Aug. 5, 1947; E, NEWT N 2,425,262

LOCKiNG DEVICE Filed Aug. 7, 1944 '4 Sheets-Sheqt'l" IN V EN TOR.

Aug. 5, 194?.

4 Sheets-She's; 2

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3 (Si/3g 39 33 A 4/3 Aug. 5, 1947.

J. E. NEWTON LOCKING DEVICE Filed Aug. '7, 1944 4 Sheet-Sheet 3 Y FIG.6

fig W MVENTOR. FIG.7 W T Aug. 5,1947;

J. E. NEWTON LOCKING DEVICE Filed Aug.

4 Sheets-Sheet 4 Patented Aug. 5, 1947 UNITED STATES PATENT OFFICE Claims.

The invention relates to means for locking safe, vault, or strong box doors, which have locking mechanism controlled by combinations, and relates more particularly to auxiliary or safety locking mechanism which will automatically render the usual locking apparatus inoperative should such mechanism be forcibly attacked.

The prime object of the invention is to provide an auxiliary or safety mechanism, adapted to be installed in connection with the usual vault door locking apparatus which when installed, will prevent entry by the destruction or changing of the usual combination mechanism.

A further object is to provide a safety or relocking mechanism which will positively and au tomatically render immovable the usual main bolts and bridle bars of a vault or safe door, should the combination be forcibly attacked.

Safety mechanism has heretofore been provided which will actuate an auxiliary bolt, or set of bolts, should the vault combination be forcibly molested. The mechanism of the present invention 'diiferentiates over such devices by functioning to lock the usual and regular locking apparatus instead of actuating a separate and distinct, or auxiliary set of bolts.

The main bolts of a vault or safe door are originally designed by the manufacturer to withstand practically any force to which they might be subjected. Consequently they are heavier and stronger than auxiliary bolts which might later be installed as a safety measure. When safety devices of the auxiliary bolt type are used, it is possible to knock off the combination and throw open the main bolts, even though the auxiliary bolts are closed in so doing. It is then possible to break off the small auxiliary bolts and open the door. This is particularly true since it is possible for the safe-cracker to spo the exact location of the auxiliary bolts by observing the vault door when open. He therefore knows exactly how and where to attack the auxiliary bolts.

With the device of the present invention installed upon the usual locking mechanism, an attack upon the combination merely renders the usual main bolts inoperable, thus leaving the door as firmly locked as it was before the combination was molested.

A further object of the invention is to provide a mechanism of this type which will automatically lock the main bolts of a door-locking mechanism against movement should attempt be made to render the safety mechanism inoperable while the door is open.

With the auxiliary-bolt type safety mechanism in use, it is possible for a person having access to the open door to either remove the bolts or jam them so they will not function. Either of these procedures would not likely be noticed by the person thereafter closing the door for the night. With my device installed, the door could not be closed if the safety mechanism had once been molested.

Another object of the invention is to design a safety device which may be installed on any type of present vault or safe door locking apparatus.

A still further object is to provide a safety mechanism which requires aknowledge of its exact location on the door, and requires especially designed tools, before it can be rendered inoperative after it has once been energized to immobilize the usual door locking mechanism.

Yet another object is to provide a device of this class which can be easily concealed, so as to prevent aperson from observing its exact location and the nature of its mechanics While a vault or safe door is open.

Other objects will be apparent from the following description when taken in connection with the accompanying four sheets of drawings, wherein:

Figure 1 is a, perspective view of the inside surface of a typical vault or safe door with the usual locking mechanism exposed, and showing one embodiment of the invention operatively installed thereon;

, Figure 2 is a perspective view detailing the em bodiment of the invention depicted installed in Fig. 1, the parts being shown in their set or cooked positions;

Figure 3 is a horizontal sectional view through the lower trigger cylinder of Fig. 2;

Y Figure 4 is a fragmentary perspective view of the left hand portion of the mechanism of Fig. 2, but showing the parts in their actuated or sprung positions.

Figure 5 is a fragmentary perspective view of the mechanism of Fig. 4, the parts being shown in position to lock the bridle bar against opening movement; 7

Figure 6 is a similar view depicting a slightly different manner of locking the bridle bar against opening movement;

Figure 7 is afragmentary perspective view of a slightly different embodiment of the invention, such embodiment being depicted as operating in conjunction with one of the main locking bolts instead of in connection with the bridle bar, the .piarts being shown in their set or cooked posit ons;

Figure 8 is a view similar to Fig. 7 with the parts in their sprung or looking positions;

Figure 9 is a vertical sectional view through the rotor and main locking bolt of Fig. 7 and detailing the relative positions of the bolt lug and rotor notch;

Figure 10 is a perspective view detailing the rotor of Fig. 7

Figure l1 is .a, fragmentary; perspective view showing a slightlydifferent manner or operatively installing the safety mechanism, the rotor being shown in position to lock the bridle bar against closing movement;

Figure 12 is a similar view showing-another manner of installing the safety mecha-nism,. the rotor being shown in position, to lock the bridle bar against opening movement;

Figure 13 is a view similar to Fig. 7.,but showing a slightly different aembodiment of the device;

and, I

Figure 14 is a-fragmentary perspective view showingthe mechanism of Fig; 13 in position to lock the'mai'nfbolt against opening movement.

- Like-"characters" of- 'reference-designate like parts in all of, the-"views wherein they occur. e

Inthe drawings: The-reference "numeral indicates as a whole a typical vault or safe door havinganinside or rear-face 2* uponfwhich is "securely and perma- "-nently mounted a continuous "steel flange" which consists of. parallel'side memberssand' 4: andtop -and bottomconn'ectingmembersiand B.

'The locking'mech'anism" ofsuch "door may consist ofwariou's types of'lever actuated bolts,

" but usuallyincludes at least two horizontally dis posed and horizontally movable members or main bolts 1 towhich is rigidlymounted atleastf'one bridle bar 8: *The bridle" bar functions to cause the -main'-' bolts '1 to move in unison" when' the -pivoted door T -handle,"' not shown, is manually actuated? The 'word'sbridle bar as used herein, are intended to mean any bar or'plate'f which causes a plurality ofldclgin'g' boltst'o' move in unison. The Inairr bolts '1' passjthroughfboth of the-side flange members *3 and 4; and their ends -bination knob, thethrust link l;lf.'may bemoved" longitudinally by rotation of the above mentioned "vault dqorhandle Thelink II isi'conriected to I the bridle bar-8 andlateral' movement of the link causes a similar'movement of the bridlebarand main bolts 1.

Insome cases the iusual vault door locking "mechanism also includes one or more vertically movable bolts [2 which are lever -actuated to enter the' 'door" frame, *not-shownrwhen" the main. bolts --1-aremoved to a closedor locking position.

I InFi'g l the main-boltsare shown asbeing in their :loeking -positionsx When in 'such" positions, 1;;their' ri'ght -hand ends I3-are projecting toith'eir fullest extent "beyond the sideflange member 4,

and the bridle bar 8 has travelled to a point in" 4 which it lies against the inside surface of the flange member 4. The opposite ends M of the main bolts 1 still project toward the left hand some distance beyond the side flange member 3. In this instance, the swinging edge of the door I is indicated by the numeral I5, and the hinged edge by the numeral l6.

With this construction, when the door is swung shut and before the main bolts are moved toward their' lockin'g positionpthe ends M of the bolts pass behind a flange carried by the door frame.

. When the bolts I are then thrown to their locking positions, their ends [4 remain engaged behind "the' flange of the door frame, and the ends I 3 135 project into sockets in the side of the door frame adjacent the swinging edge 15. "All oftheabove described door parts and lockingwrnechanism are usual, in one form or another, with practically all vault or safe doors, and

have beendescribed hereinabove only for the purpose of describing hereinb'elow how the device of the present invention isinstalled' and: nmctions with relation tbzsuchusual vault door locking mechanism. It is pointed' ut that the device of the present "invention may be installed to :function' upon any vault or safe door so long as its usual locking means: includes a"combination apparatus," one or moremain bolts; or one orm'ore bridle bars. It is further pointed 'outitha't 'th'e'rnosticommon method for'a safe'cr'acker to, forcibly open a vault or safe door is to first knock orbla'st off the combination, Whenthis i'sdon'e"; the doorl'haindle is then free to be turned. to'movev the'link Il and consequently the 'main boltsf'l to open position.

' As "will be, more fully described ,herinbelow, the device. ofqthepre'sent. invention is designed to lock the main bolts. against movement sh'ould the combination be forcibly'attacked.

7 'One embodiment of the invention is detailed in Figs. "1 to 5,.inclusive' and includes:

A"bracket 20; preferably of sheet steel,.having a flat body portio'h 2L andtwoparallel. end walls ZZand 23 whichi'extend perpendicularly to the body portion 2| and which are integral therewith. The endwalls 22.,and23 aretalignedly bored to receive a stationaryshaft' 24 rigidly mounted between 1 said ,walls, and having .7 an end portion 25 passing through the wall 23 and extending there- -beyond'.""The' extending portion 25 is .exteriorly .threaded'and engaged in a threaded perforation in th'eiside flange-member A ofrthe doo'r IQ: A thrust-nut 26 provided around the shaft 24 to urge the wall 23 into firm engagementwith-the 'Betw'een theend walls 22mm 23- and surrounding the shaft 24' there is provided a tubular sleeve ZTupon one end of .which is-rigidly-mounted one or more. discs or rotors-28. ALhelicaL-SpringL-ZS surroundsrthe' sleeviland shaft 24 andshas 'one end engagedwith the rotor and its other-end held stationary. as Iiwill: be more. Lfullydescribed 'hereinbelowf ,The spring is so arranged :thatiits tension is. exerted tol-normallyrurge the sleeve 21 and, rotor. 28.-to .rotate in adirection in which their: upper) surfaces v moveover and toward the body 2l'.""The'periphery of the rotor 28 is-pr0- vided with an. outwardly projecting pin 30- which acts to limit orstoprotation of the rotor by-contacting the body 2L should the'rotorbe released to action' of the spring--28 as is-more fully-described hereinbelow.

A spring actuated trigger mechanism 3 l--(Fig-. 3) is also mounted between the ends'22:--and 2 3 of thebracket' 20. The office of this trigger mechanism is to normally latch the rotor 28 against movement by the spring 29 as it is later described herein. The trigger mechanism 3| includes:

A rigid'metal tube 32 having exterior threads 33 at one end. The tube 32 is mounted in aligned perforations in the ends 22 and 23 of the bracket 28, the perforation in the end 23 being threaded to engage the threads 33 on the tube in an obvious manner, Slidably disposed within the tube 32 is a tubate plunger 34 having at one end a transverse pin 35, to which is attached centrally one end of a wire line 36. The other end of the plunger 34 has a heavier transverse pin 31, one end of which extends outwardly through an elongated slot 38 in the wall of the tube'32. A helical retrieving spring 39 has one end attached to the central portion of the pin 31 within th plunger, and its other end is anchored to a. third transverse pin 48 which passes through the tube 32 and is riveted in place as shown.

As best shown in Fig. 1, the bracket 28 and its contained mechanism is mounted against the side flange member 4 and beneath the bridle bar 8. The length of the shaft 24 is so arranged that when the bridle bar lies against the member 4, or in other words when the bridle bar and main bolts 1 are in their locking positions, the right hand face 4| of the rotor 28 lies clear of the left hand edges 42 of the bridle bar. The rotor disc or discs 28 have a portion of their peripheries severed upon a single plane to form a flat surface 43. The disc 28, lying most remote from the bracket end 22, if two discs are used, has a superficial notch 44 in its peripheral surface.

With the bracket and its contained mechanism installed as shown in Fig. 1, the disc 28 is rotated to a position in which the notch 44 coincides with the elongated opening 38 in the tube 32, and the plunger 34 is drawn toward the bracket end 22 by a manual pull upon the line 36. This movement of the plunger overcomes th resistance of the spring 39 and permits the projecting end of the pin 31 to enter the notch 44 of the rotor disc 28. This engagement of the pin in the notch is shown in Fig. 2, and when so engaged, the plane surface 43 of the rotor disc lies parallel to the inside surface of the bridle bar 8. In order to hold the pin 31 within the notch 44, the line is extended to and firmly connected with the disc portion ID of the combination apparatus 9.

So long as the pin 31 remains in the notch 44, the disc 28 is held against the rotation which the spring 29 is attempting to accomplish. Also, the flat portion 43 of the rotor 28 is held toward the bridle bar 8, and consequently the bridle bar may freely pass the disc 28 as the bolt mechanism is moved to open or to closed position. This normal position of the safety device is illustrated in Figs. 1 and 2, and all parts will remain stationary so long as the position of the disc H] of the combination apparatus is not changed. It is to be understood, of course, that a normal operation or manipulation of the combination will not in any manner move th disc [8 to which the line 36 is attached. The entire safety mechanism is thus held in its set or cocked position solely by the end of the line 36 being anchored to the disc l0.

However, should the combination apparatus be attacked either by a blow or blast upon its outside knob, the position of the disc Ill would be changed. Such a change, either radial or lateral will cause a slight slack in the line 36. Since the pin 31 is barely within the notch 44, the .least slackening of the line 36 permits the spring 39 to withdraw the pin 31 from the notch 44. When this occurs, the spring 29 instantly rotates the disc 28 until the stop pin 38 meets the body 2| of the bracket 28. The resultant position of the disc 28 is illustrated in Fig. 4. It is apparent that such rotation of the disc 28 will mis-mate the surface 43 thereof and the inside surface of the bridle bar, and the result is that a rounded portion of the rotor disc 28 will be presented in the path of the bridle bar should attempt be made to move it and the main bolts 1 to an unlocked position. Consequently, even if the entire combination 9 were to be blown or broken off the door, the

main bolts and bridle bar would remain as thoroughlylocked as they were originally.

It was stated above that either one or two of the. rotor discs 28 could be formed integrally with the sleeve 21... By this is meant that the left hand disc 28 (Fig. 2) could well be spotwelded or otherwise attached to the end 22 of the bracket 28, if desired. In such a case, only the right hand rotor disc 28 would be rotated by the spring 29. On the other hand-the two rotor discs 28 shown could well be formed in one piece.

Attention is called to the fact that the following side 45 of the notch 44 lies at an angle to the rotative axis of the rotor 28 and rearward with relationto its direction of rotation, This is clearly shown in Fig. 4, the sid 45 of the notch is so disposed for the purpose of permitting the action of the spring 29 to assist in moving the pin 31 out of the notch, should the tension of the line 36 be loosened. With this arrangement, slackeningof the line 36 would permit the rotation of the disc 28 under action of the spring 29 to alone move the pin 31 out of the notch 44, even though the spring 39 was eliminated, or for some reason failed to function.

In the above description of the trigger mechanism, the pin 31 was described as having only one end projecting outwardly through th tube 32. It may'well be found desirable to build the trigger mechanism with both ends of the pin 31 projecting. In such a case, another slot 38 would be provided in the tube 32, opposite to the one shown. 7

Fig. 5 illustrates the relative position of the rotor 28 and the bridle bar 8 after the trigger mechanism has been released and the rotor has rotated into the path of the bridle bar. It is obvious that when the rotor is in the radial position shown, the rotor positively blocks any unlocking movement of the bridle bar and consequentl any similar movement of the main locking bolts 1.

The bridle bar in Fig. 5 is shown as having a through slot 46. This slot is of a width sulficient to permit entry therein of the rotor disc 28 should the rotor be released to rotation during the time the bridle bar is at the left hand end of its throw, or in other words, when the main bolts are in their full unlocking positions. Should some one attempt to defeat the device by cutting or loosening the line 36 while the bridle bar is in its fully unlocked position, the disc 28 would merely rotate and partially enter th slot 46. The door locking mechanism would then be locked in an open position. Tampering would :be apparent, because the door could not be locked until the safety mechanism was re-set.

In connection with the safety mechanism thus far described herein, it is thought to be apparent that it will automatically function to anchor the regular door locking mechanism in either a locked or unlocked position, should the usual or normal relation of the regular tumbler apparatus 7 with the ooorbe changed, or should the lineal; or trigger mechanism 31 be disturbed after'haw. ing once'bee'n set. In Fig.6 is shown -a mountin arrangement of the. safety mechanism above described; where.

in the rotor- 28 and shaft 21 have-been reversed in thesbracketifl. vIn such amounting arrangement, the bridle bar is' provided with avthrough slot 4T which issimilarin dimensions to the slot 46 of Fig. 5, but which is so located with relation-to the 'bridle bar that it lies directly over the rotor-:28 when: the bridle bar and .bolts 1 are in their locking position. In thiscase, the line 38 extends outwardly through-the opposite end of the tube 32 than it does in Fig. 4. Should the line 36 be loosened-while the bridle bar is in looking position as shown, or in other words, while it is against the side fian'ge member-l of the door, the rotor 28 will rotate-andengage within the slot 41 to anchor the bridle bar against any opening movement.

With this installation, should the line 36 be tampered with while the bridle bar and :bolts 1 are in their unlocking position, or in other words, while the bridle bar is at the left handendof its throw, the rotor 28 would rotate into a position in which it is disposed between the right hand edge-48 of the bridle-bar, and the left hand face of the side flange member 4 of the door. This would anchor the bridle bar and main boltsagainst any movement toward door-locking positions.

In Fig. 7 is shown another manner of installing the safety mechanism of the present invention. In this case, the rotor 29 is adapted, when re-- leased as above described, to move into the path of a shoulder carriedby one of the main bolts 1, instead of by moving into the path of the bridle bar as isdone in the arrangement of Figs. 1- to 6 inclusive.

In thisem'bodiment, the reference numeral '50 indicates a projecting element, lug, or shoulder Which-is rigidly mounted on one-of the main bol'ts l of the regular door locking mechanism; The

bracket 20 is positioned against the side flange member 3 of the door by having the shaft 25 threadedlyngaged in a threaded perforation for this: purpose. In orderto obtain a positively stable position: of the bracket- 20, its side 24 is provided: with a through perforation through which the main bolt 1 may freely slide.

Instead of the rotor 28 being cut off to form the fiat-surface-M (Fig; 2') ,the rotor isprovided' with a'peripher'al trans-verse'groove 52 into which theprojection or lug 50 enters when the bolt 1 is moved to its fully locking 'position, and when the trigger mechanism has once been-set by anchoring-the line 36 to the tumbler'mechanism: In Fig. 7 the trigger mechanismis illustratedin' its setposition, and is holding the rotor .28

against rotation under actionof the. spring 29.

The'main bolt Tis' shown in a fullyopenor unlocked position. The dotted lines in the, figure illustrate thepositionsof, the projection or lug 58' when. the,.b,o1t is in its locking position...;.In thisinstancethe rotor 28- is.urged by thespring 29 to rotate in a directionlover and towardthe;

door surface 2, should the line 36- be loosened.

If the line 36-were to-be loosened when thebolt 1 is in the longitudinal position in whichit is shownin- Fig. 7-, the rotor 28 wouldspinxto ap proximately the position shown in Fig.8; This. wouldmove: the groove 52 outof thepath-of tray-i e1 of. the lug 50, and would result in th'ezpreven tion of the sition;

As a means :for anchoring the main bolt 1 against unlocking movement shouldtheline 36 be loosened when the lug is within the groove 52, or when in the dotted line position. of Flg.'7, the following described structure is provided.

As best -seen--in Figure 10,a. straight sided groove 53' isprovidedin' the. center of the following. side of the notch 52. The similar side of the lug 50 is provided with a projecting pin 54. Shouldv the; line 36 be loosened when th lug 50 is within'the groove 52, then the pin 54 will en ter the groove-53 and: prevent longitudinal movebolt 1 being-moved to its locking-p0..

, mentor the bolt 1-. (See-Figs. 9 and 10.)

Inthe embodimentof Figs. 7 and 8, the safety meohanismhas' been shown installed by attachmentgto the side flange number 3- of the door, or in other words, the side fiangemember lying next to the hinged edge of the doors It ob-= vious-that a similar installation could-well be made by mounting the device on th side flange member 4 01: the door instead of the member 3. In thatevent, the lug '50 would be so located on the. belt I that it would residein the slot 52 of the rotor during the time the bolt is in its fully open position, and when the bolt is in its locking position, the lug 50 would lie between the side member-4 and the'rotor disc 28. In this event, should the disc 28 be released to rotation" when the bolt T is in its locked position, said disc Will rotate into-the path thelug 50 must travel to unlock the bolt 1.- If the disc '28 wereto be released to rotation "while the bolt 1 was in its unlocked position, then the pin-54 would function in the notch 53 as described with relation to Figs. 7 and 8.

In Fig. 12, the mechanism of Fig-5 is shown as it appears when the bridle bar is locked in an open position by'entry of the disc 28 into the slot 45. In this instance; the side 22 of the bracket is shown as being short enough to be beneath the bridle bar '8' as the bridle bar moves to a fully open position.

In Fig. 11 the safetyinechanism of Fig. 6 is shown as it appears when the disc 28 is in sprung position-with the-bridle bar in fully open position.- In this'case the rotor 28 has been rotated to interpose between the bridle bar and the side flange numberl of the door, thus preventing movement of the bridle bar toward lockingfposition;

It'is'obvious'that if the line- 26 can. be arranged to holdthe trigger mechanism 3| in a set" position-pinorder to anchor the disc -28aga'inst rotation'ythen' the line could also be arranged directly with" the disc to anchor the same against rotation; should the trigger mechanism be entirely deleted. -Such'adevice is illustrated in Figs. 13 and-14. 1

The mechanism of Fig-J13 is substantially the same-as-that of Fig-.-7, except that the trigger mechanismhas been-omitted, and the line '3 6 has been-mounted directly to the periphery of the disc ZB'JIn this case, the other end of the;

'20 may be eli-minated,. and a brace member 5'6' anew In Figure 14 structure similar to. that of Fig.

13 is shown, the only difference being that the brace -5 has a bottom portion 51 which extends beneath the rotor '28, and'has an upwardly extending return portion 58 which passes slightly above the lower face of the disc. This type of brace may be used as a caution againstsome'one attempting to reset the disc 28by the useof a tool inserted through a borehole made in the door for that purpose.

From the foregoing descriptive matter it is thought to be apparent that a safety device has been provided which will positively and automatically "re-lock the usual safe door locking mechanism should the tumbler apparatus be tampered With to the extent that it is even slightly displaced with relation to the door. Also that the safety device is capable of such a variance of different types of installation, that it may be accommodated to any and all types of vault door locking structures.

I claim:

1. In a device of the class described, the combination with a sliding member of a door locking mechanism, and with releasable apparatus for normally maintaining the member stationary, of a rotatable element adjacent the path of said member; spring means for urging the element to partial rotation into said path; and means engaging said apparatus for normally holding said element against rotation into said path.

2. In a device of the class described, the combination with a sliding member of a door locking mechanism, and with releasable apparatus for normally maintaining the member stationary, of:

a rotatable element adjacent the path of said member; spring means for urging the element to partial rotation into said path; and operative connection between said element and said apparatus, said connections normally holding the element against rotation into said path, but adapted to release said element to rotation should the apparatus be bodily moved with relation to said door.

3. In a device of the class described, the combination with a sliding bolt of a door locking mechanism, and with a releasable tumbler operated apparatus for normally maintaining the bolt stationary, of a rotatable element adjacent the path of said bolt; spring means for urging the element to partial rotation into said path for preventing movement of said bolt; and means for normally holding said element against rotation I in said path, said means attached to said apparatus and adapted to release said element should the apparatus be bodily moved with relation to the bolt.

4. In a locking mechanism for a door, the combination of: a slidable element adapted for movement into and out of the door-locking position; a tumbler controlled apparatus adapted when in one position of adjustment to prevent unlocking movement of said element; a shoulder on the element; a cam rotatably mounted on said door, said cam when in one rotative position adapted to lie in the path of said shoulder; means for urging said cam towards rotation into said position; and means connected to said tumbler apparatus for holding said cam out of said path, said holding means adapted to release said cam should said tumbler apparatus be bodily moved with relation to said door.

5. In a locking mechanism for a door, the com- 10 bination of g a slidablegbolt adapted for movement into a locking position of projisctionbeyohdthe edge of said door; a tumbler, controlled apparel.- tus forpreventing movement'of the "bolt; a* rigid lateral projection carried by'theibo'lt; ashaft; a

laterally projecting element rotatably 7 carried by the shaft -and when in one rotative position, adapted to lie in the path of said bolt projection; spring means for normally-urging saidj element toward rotation into said path; and means con nectedto saidttumbler apparatus for normally holdingsaid element out of said path, said holding means adapted to release said element to the action of said spring means should said tumbler apparatus be bodily moved with relation to said door.

6. In a device of the class described, the combination with a sliding member of a door locking mechanism, and with releasable apparatu for normally maintaining the member stationary, of: a rotatable element adjacent the path of said member; spring means for urging the element to partial rotation into said path; and means engaging said element and said apparatus for normally holding said element against rotation into said path, said last means adapted to release said element should said releasable apparatus be bodily moved with relation to said slidin memher.

'7. In a device of the class described, the combination with a sliding member of a door locking mechanism, and with releasable apparatus for normally maintaining the member stationary, of I a rotatable element adjacent the path of said member; spring means for urging the element to partial rotation into said path; and means engaging said element and said apparatus for normally holding said element against rotation in said path, said last means adapted to release said element should said means be bodily moved with relation to said door locking mechanism.

8. In a locking mechanism for a door, the combination of: a slidable element adapted for movement into and out of a door-locking position; a tumbler controlled apparatus adapted when in one position of adjustment to prevent unlocking movement of said element; a shoulder on the element; a cam rotatably mounted on said door, said cam when in one rotative position adapted to lie in the path of said shoulder; means for urging said cam towards rotation into said position; and means connected to said tumbler apparatus for holding said cam out of said path, said holding'means adapted to release said cam should the holding means be moved with relation to said cam.

9. In a locking mechanism for a door, the combination of: a slidable element adapted for movement into and out of a door-locking position; a tumbler controlled apparatus adapted when in one position of adustment to prevent unlocking movement of said element; a shoulder on the element; a cam rotatably mounted on said door, said cam when in one rotative position adapted to lie in the path of said shoulder; means for urging said cam towards rotation into said position; and means connecting said cam and tumbler apparatus for holding said cam out of said path, said holding means adapted to release said cam should the distance between the two be varied.

10. In a locking mechanism for a door, the combination of: a slidable element adapted for movement into and out of a door-lockin position; a tumbler controlled apparatus adapted enemas 11 when in one position oiladjustment toprevent unlocking movement of. said ielement;--:a shoulder on the element a. Loam rotatably. mounted on" said door, said -cam when in one rotative position adapted to lie in .the path .ofisaidrshoulder; means 8 for urging said cam towards rotation ill-Said position; and means connecting-saidcam and tumbler. apparatusnfor holding said camiout; of said. path, said holding means adapted to release said cam should itseposition with' relation tothe l0 calm or the tumbler xapparatus bevdisturbe d.

. ,JOHN E. NEWTON TREFERENCESY ICITED The following references are of :record in :the file ofthis: patent:

' UNITED"STATES* PATENTS Number Name eDate 1,398,465 Paterson Nov. 29; 1921 1,410,800 1 Dillon Ma,r 28-,v-1922 1,655,975 Schmidt Jan;'10, 1928 1,857,971 Oleschak May 10, 1932 .-1,'797,747 VAiles. Mar. 24, 1931 

